Electronic Sensor Technology posted a net loss for the second quarter. The Newbury Park-based developer of equipment used to analyze odors and fragrances reported a net loss of $830,413, or a loss of $0.02 per diluted share, on revenues of $690,504 for the quarter ending June 30. That is an increase from the net loss of $753,676, or a loss of $0.01 per diluted share, on revenues of $621,407 for the same period in 2006. For the six months ending June 30, EST reported a net loss of $2.19 million, or a loss of $0.05 per diluted share, on revenues of $1.17 million. That is more than double the net loss of $1.02 million, or a loss of $0.02 per diluted share, on revenues of $1.15 million for the same six month period in 2006. The company has made progress in the second quarter with strong business in China and multiple orders from an international consumer products company, said EST President and CEO Barry S. Howe. “We have added sales representatives covering the Midwest, southeast, California, and Pacific Northwest to join our existing representatives in the Northeast,” Howe said. “We have also appointed a distributor to cover Europe.”